[Discover] Organization of the Petroleum Exporting Countries http://www.opec.org/home/ (energy money opec economics)
 [Discover] OPEC Country Analysis Brief http://www.eia.doe.gov/cabs/opec.html (opec energy fuel)
 [Discover] A brief history of OPEC http://www.opec.org/aboutus/history/history.htm (energy fuel eb)
 [Discover] Louisiana Civics GLE 37 http://www.paulblankenship.com/SocialStudies/LaStudies/LaCivics/louisianacivicst.html (internationalrelations opec civics alliance)
 [Discover] "Welt muss sich nicht sorgen" http://orf.at/071117-18769/index.html (peakoil opec oil)
 [Discover] Cato-at-liberty » Is There an Oil Price Bubble? http://www.cato-at-liberty.org/2008/04/10/is-there-an-oil-price-bubble/ (energy commodity economicindicators supplyanddemand)
 [Discover] CERA: Cambridge Energy Research Associates http://cera.com/aspx/cda/public1/home/home.aspx (opec oil)
 [Discover] A brief history of OPEC http://www.opec.org/aboutus/history/1970 (opec)
 [Discover] Energy Information Administration - International Energy Data and Analysis World Energy statistics ... http://tonto.eia.doe.gov/country/index.cfm (energy statistics countries international)
 [Discover] Saudi minister warns of dollar collapse | Business News http://www.thebusiness.co.uk/news-and-analysis/358346/saudi-minister-warns-of-dollar-collapse.thtml (opec dollar oil)
 [Discover] Annual Oil Market Chronology Energy Data, Statistics and Analysis - Oil, Gas, Electricity, Coal http://www.eia.doe.gov/emeu/cabs/AOMC/Overview.html (opec oil gas grafiek)